Cook, always a keen observer of people and their differences, was inspired by the work of psychologist Carl Jung and his theories for example, the concepts of introversion and extroversion. The MBTI was invented in 1942 by Katharine Cook Briggs and her daughter, Isabel Briggs Myers. 'Many personality psychologists consider the MBTI to be a somewhat valid measure of some important personality characteristics but one that has some important limitations,' said Michael Ashton, professor of psychology at Brock University in Ontario.
But there are others who take a milder view of the test.
Despite the popularity of the test, many psychologists criticize it - hardly a few months go by without a harsh take-down of the MBTI in the media, where a psychologist will say that the Myers-Brigg is unscientific, meaningless or bogus.
